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20以内的进位加法,是全日制十年制小学数学第一册的一个重要内容,也是小学数学中的最基础部分。在小学数学第一册中,20以内的进位加法是按照结果分别
The carry addition within 20 is an important part of the first volume of the 10-year full-time elementary school mathematics and is also the most basic part of elementary school mathematics. In the first volume of elementary school mathematics, the carry addition within 20 is based on the result